In response to this question, Elder Yujian provided an explanation.
"Forbidden zones are formed due to a variety of complex reasons,
possibly as a result of Supreme incarnations or after the death of a Supreme.
They might also be caused by various earthly anomalies, and inside, dangers abound!
The Ninth Restricted Area is the most complex existence among all the restricted areas."
"Deep within, we aren't clear.
In the middle and outer circles, the threats we know of include Asura Ghosts and Evil Spirits!
If someone with high cultivation enters, they easily attract the attention of powerful Asura Ghosts and Evil Spirits!
Once they act, it causes a massive commotion,
drawing in more powerful Asura Ghosts and Evil Spirits to attack together!
Alone, no one could survive!
And those cultivators too weak, entering would be quickly killed by Asura Ghosts and Evil Spirits.
